package org.huiway.huipicturebackend.manager;

import cn.hutool.core.io.FileUtil;
import com.qcloud.cos.COSClient;
import com.qcloud.cos.exception.CosClientException;
import com.qcloud.cos.model.COSObject;
import com.qcloud.cos.model.GetObjectRequest;
import com.qcloud.cos.model.PutObjectRequest;
import com.qcloud.cos.model.PutObjectResult;
import com.qcloud.cos.model.ciModel.persistence.PicOperations;
import org.huiway.huipicturebackend.config.CosClientConfig;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

@Component
public class CosManager {

    @Resource
    private CosClientConfig cosClientConfig;

    @Resource
    private COSClient cosClient;

    // ... 一些操作 COS 的方法

    /**
     * 上传对象
     *
     * @param key  唯一键
     * @param file 文件
     */
    public PutObjectResult putObject(String key, File file) {
        PutObjectRequest putObjectRequest = new PutObjectRequest(cosClientConfig.getBucket(), key, file);
        return cosClient.putObject(putObjectRequest);
    }

    /**
     * 下载对象
     *
     * @param key 唯一键
     */
    public COSObject getObject(String key) {
        GetObjectRequest getObjectRequest = new GetObjectRequest(cosClientConfig.getBucket(), key);
        return cosClient.getObject(getObjectRequest);
    }

    /**
     * 上传对象并解析（附带图片信息）
     *
     * @param key  唯一键
     * @param file 文件
     */
    public PutObjectResult putPictureObject(String key, File file) {
        PutObjectRequest putObjectRequest = new PutObjectRequest(cosClientConfig.getBucket(), key, file);
        //对图片进行处理（获取基本信息也被视作为一种图片的处理）
        PicOperations picOperations = new PicOperations();
        //  表示返回原图信息
        picOperations.setIsPicInfo(1);
        //图片处理规则列表
        List<PicOperations.Rule> rules = new ArrayList<>();
        //1.图片压缩，转成webp格式
        String webpKey = FileUtil.mainName(key) + ".webp";
        PicOperations.Rule compressRule = new PicOperations.Rule();
        compressRule.setFileId(webpKey);
        compressRule.setBucket(cosClientConfig.getBucket());
        compressRule.setRule("imageMogr2/format/webp");
        rules.add(compressRule);
        //如果没有后缀
//        PicOperations.Rule transferRule = new PicOperations.Rule();
//        transferRule.setBucket(cosClientConfig.getBucket());
//        transferRule.setRule("imageMogr2/format/png");
//        String transferKey = FileUtil.mainName(key) + "_transfer" + ".png";
//        transferRule.setFileId(transferKey);
//        rules.add(transferRule);
        //2.缩略图处理，仅对 > 20 KB的图片生成缩略图
        if (file.length() > 20 * 1024) {
            PicOperations.Rule thumbnailRule = new PicOperations.Rule();
            //约定一个针对原图压缩之后的缩略图的图片名称，即文件的上传路径
            //先取出原图的路径，增加_thumbnail的后缀表示缩略图，加上原图的后缀地址，原图是什么格式缩略图就是什么格式
            //拼接缩略图的路径
            String thumbnailKey = FileUtil.mainName(key) + "_thumbnail." + FileUtil.getSuffix(key);  //在原图的基础上进行压缩，而不是在已经转换成webp的基础上进行压缩
            thumbnailRule.setFileId(thumbnailKey);
            thumbnailRule.setBucket(cosClientConfig.getBucket());
            // 缩放规则 /thumbnail/<Width>x<Height>>（如果大于原图宽高，则不处理）
            thumbnailRule.setRule(String.format("imageMogr2/thumbnail/%sx%s>", 512, 512));
            rules.add(thumbnailRule);
        }
        //构造处理参数
        picOperations.setRules(rules);
        putObjectRequest.setPicOperations(picOperations);
        return cosClient.putObject(putObjectRequest);
    }

    /**
     * 删除对象
     *
     * @param key 文件 key
     */
    public void deleteObject(String key) throws CosClientException {
        cosClient.deleteObject(cosClientConfig.getBucket(), key);
    }

}
